Riveting hammer



Nov. 10, 1942.

E. B. L EAR R'IVETING HAMMER Filed NOV, 2, 1939 INVENTOR EARL 5. 5.14,?

ATTORNEY Patented Nov. 10, 1942 OFFICE RIVETING HAMMER Earl B. Lear,Garfield Heights, Ohio, assignor to The Cleveland Pneumatic ToolCompany, Cleveland, Ohio, a corporation oi' Ohio- Application November2, 1939, Serial No. 302,547

(Cl. 7B-48) 2 Claims.

This invention relates broadly to riveting machines, but moreparticularly to an improved front end for portable riveting hammers ofthe iluid actuated percussive type.

One object of this invention is to produce a riveting hammer capable ofdriving `rivets disposed in angular relation with respect to the normalcenteraxis of the riveting4 hammer, thereby rendering possible rivetingoperation in places heretofore inaccessible with the usual rivetinghammers.

Another 'object of this invention is to produce an angle-riveting hammerforming a compact assembly which is strong, durable and efficient.

Other objects and advantages more or less ancillary to the foregoingreside in the specic con-` struction and aggroupment of the elementspeculiar to this structure, as will become apparent from a more completeexamination of this speciflcation.

In the drawing:

Fig. 1 is a side elevational view, partly in section, of a rivetinghammer embodying the invention. l y

Fig. 2 is a view looking in the direction of the arrows 2-2 in Fig. 1. l

Fig. 3 is a cross sectional view taken in a plane indicated by line 3--3in Fig. 1.

Referring to the drawing, III is the cylinder of a riveting hammer andII. the back head within which is housed the usual valve mechanism (notshown). I2 is a connection screwed in the free end of the head II,through which motive lluid, controlled by a throttle valve I3 operableby a handle I4, may be admitted into the piston chamber I5. In thischamber is reciprocably mounted a iluid actuated piston I6 capable ofdelivering a rapid succession of impacts to a plunger I1 slidable withina bushing I8, which plunger has its inner end extending into the frontend of thev chamber I5, while its other end is terminated by a head I9resting against the front end of thel bushing I8.

The front end oi the cylinder I Il is formed by two parallel lugs 20 and2| extending laterally from one side of the cylinder I and between whichis located the head I9 of the plunger I1. The lower foremost corners ofthe lugs and 2| are united by an integral bridge 22 having a bore 23extending therethrough at substantially right angle from the center axisof the cylinder I0. In this bore is slidably mounted a rivet set 9includlng a shank 24 slidable in the bore 23 and formed with a head 25engageable with the work shown plates 21. To prevent accidentalwithdrawal of the rivet set from the bridge 22, the shank 24 near thefree end thereof is provided with a spring clip 28 engageable with thebridge 22.

Mounted between the lugs 2U and 2I, there is a substantially L-shaped'anvil block 29 pivotally connected to the lugs by a cross pin 30. Theanvil block 29 is provided with two operating faces 2| and 32 disposedat rightangle from one another, the former being engaged by the head I9of the plunger I8, and the latter resting on the free end of the rivetset 25. In thickness the anvil block 29 fits closely between the lugs 20and 2I to prevent lateral movement of the block relative to the lugs. d

In operation, the reciprocations of the piston I6 resulting from theaction of the motive fluid alternatively admitted into the extreme endportions of the piston chamber I5, will cause the piston I6 to deliver arapid succession of impacts on the plunger Il, which impacts are in turndelivered to the anvil block 29 and therefrom to the rivet set 9 throughthe pivotal movement of the block 29 on the cross pin 30. In order totransmit the impacts from the plunger I'I to the rivet set 9 withoutloss of efilciency, the anvil block 29 is calculated to engage the headI9 of the plunger I1 while the plunger is at the extreme end of itsinward movement relative to the cylinder I0, with the rivet set 9 at theextreme end of its inward movement relative to the bridge 22 Whileengaged by the operating face 32 of the anvil block 29.

From the foregoing explanation, it will be understood that through theanvil block 29 pivotg ally mounted within the front end of the cylinderin the drawing as a rivet 26 extending through 55 4 III, it is possibleto transmit the impact of the plston I6 to the work or rivet 26 locatedin angular relation with respect to the center axis of the cylinderIII.` While the drawing shows a construction wherein transmission ofimpacts takes place at substantially right angles, itis clear thatthrough this novel arrangement of parts it would be possible to transmitimpacts of the piston IB at any desired angle.

Although the foregoing description is necessarily of a detailedcharacter, in order to completely set forth the invention, it is to beunderstood that the specific terminology is not intended to berestrictive or conilning and it is to be further understood that variousrearrangements of parts and modifications of structural detail may beresorted to without departing from the scope or spirit of the inventionas herein claimed.

I claim:

1. A riveting hammer comprising an elongated cylindrical housing, apower actuated impact delivering piston concentric in said housing, an

'impact receiving plunger concentric in said housing slidable thereinrelative to said piston, a pair of laterally spaced parallel wallsforming one end of said housing, a rivet set slidable between said Wallstransversally of said plunger, and an impact transmitting anvil blockcarried by said housing for pivotal movement between said Walls, saidanvil block having anglarly disposed faces perpendicularly engaged bythe adjacent ends of said plunger and rivet set.

EARL B. LEAR.

